Combined square and bevel for ascertaining the length of rafters, &amp;c.



J: C. BROWN.

COMBINED SQUARE AND BEVEL FOR ASCERTAINING THE LENGTH OF RAFTERS, fie,

APPLICATION FILED AUG.9. I9Ie.

immm, Patented Oct. 16,1917.

2 SHEETS SHEET I.

J. C. BROWN.

COMBINED SQUARE AND BEVEL FOR ASCERTAINING THE LENGTH OF RAFTERS, &c.

APPLICAUON HLED AUG, 9. 1916.'

Patented Oct. 16,1917.

2 SHEETSSHEET 2.

1| "TIMI 111 "an sra E ear" ra ion;

JOHN G. BnowN, d1? Adrienne; ceased;

COMBINED saunas Ann raven For, esennmimnc'wiir LENGTH or RAFTERS,

Patented Got. 16, 19W.

retracts;

Specification of Letters retreat.

Application filed August 9', leis. Serial No. 113,936; v

To all ZLiLONZ iii may concern:

Beit known that 1, Joint C. BiioWN, a

citizen of the United States, residing at Atlanta, in the county of Fulton; and State of Georgia, have invented certain new and useful Improvements in; Combined Squares andBevels for Ascertaining the Length of Rafters, &c-.;and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable, others skilled in'the art to] which it appertains to make and use the same. I v

The invention relates to a combined square and bevel forascertaining the'length of rafters, etc. I a

The object of the present-invention is to provide a simple, practical and compara tively inexpensive combined square and i bevel equipped with pivoted blades arranged for use in connection with the hip and common rafters of a roof for enabling the roof dimensions as to the bevel or inclination of the common and hip rafters and the length of the same to be readily ascertained.

A further object of the invention is to provide a device of this character provided with means for connecting the pivoted rafter blades for effecting an'automatic adjustment of one of the blades when the other is manually adjustedso that the ineasuring instrument will indicate the bevel of both the common and hip rafters of a roof.

The invention also has for its object to provide means for enabling the pivoted rafter blades to be readily adjusted on a square and securely clamped in their relative adjustmerits;

With these and other objects in view, the

invention consists in the construction and novel combination of partshereinafter fully.

described, illustrated. in the accompanying drawings, 'and pointed out in the claims hereto appended; it being understood that various changes in the form, proportion, size and minor details of construction, wit-11 in the scope of the claims, maybe resorted tolwithout departing fromthe spirit or sacrificing any-"of the-advantages of the invent-ion.

Inthe drawing 1.

Figure l is a side elevation" of'acombined' bevel and' square "constructed in accordance with this invention,

Fig 2 is a "plan View,

Fig. s s: a vertical sectional view onthe line 33 of Fig. l, i

Fig. 4 is a longitudinal sectional view illustratingthe means for connect ngdhe pivoted blades for securing a simultaneous movement of the same when one of the parts s ad usted, I

Figs. 5 and .6 are blades, v p 1 Fig. 7 is a detail view illustrating the @011- sections of the combined clamp and handle.

Fig. 8 is abottoin plan view of the combined handle and clamp. v p r Like numerals of reference designate corresponding parts in the several figures of the drawings. v 5

In the accompanying drawings in which is illustrated the preferred embodiment of in, their adjustment. The combined handle f and clamp at which may be constructed of any suitable material is adapted to be fitted against the arinS of the square 1 at the outer edge thereof, as clearly illustrated in Fig; 1 of the accompanying drawings and the rear section is provided with project-ions;

or flanges 9 forming a guide and adapt tofit against the face of the square to able the-rear section of the combined j e and clamp to be accurately positioned against and in parallelism with the arm of the square. The sections are connected at theirlower ends by hingesand the upper portions of the sections are recessed at their 7 inner faces to provide intervening spaces 12 and 13 for the reception of'the rafter blades. ,Theecommon rafter blade WhlCll is arranged between the front and intermediate sections of the combined clamp and' handle is provided at its upper portion with an arcuate groove 14 formed :by stamping,v

the blade and providing a projecting rib at theopposite face of the blade 2. The other or hip rafterblade is provided with a similar arcuate groove 15 formed in the detail views of the pivoted ends of the hip and common rafter c5 struction of the front rear andlintermediate opposite face of the blade 3 by stamping the same. The inner or intermediate section 7 of the combined clamp and handle is provided at its upper portion with an cuate ribs 16 arranged concentric with the grooves let and 15 and projecting into the same to form a guide for the blades 2 and 3 in the pivotal movement thereof. The guide ribs 16 and the curved grooves are described on an are having as its center a point on the graduated outer edge of the arm 8" of the square. By this construction the blades 2 and 3 are mounted for pivotal movement on the handle or clamp on a common axis. The blades are clamped in their adjustment by'means of a screw 17 provided at the front with a head and extending loosely through the sections 5 and 7 and threaded into an opening 18 in the rear section 6. The openings 19 and 20 in the sections 5 and 7 are smooth, and the said sections 5, 6, and 7 of the combined handle and clamp are'forced into engagement with the blades 2 and 3 which are securely clamped in their adjusted positions. When the screw is loosened the blades are adapted to be adjusted with relationto each other and t0 the body and arm of the square.

The blades are caused to move simultaneously when one of them is adjusted by means of a connecting lever 2l'eXtending longitudinally of the said blades and pivoted at an intermediate point by a screw 22 or other suitable fastening device to the front section 5 of the combined handle and clamp and having its inner and outer arms connected respectively with the blades 2 and 3. The blade 2 is provided at theinner side of the pivot 22 with a longitudinal slot 23 which receives a suitable pivot 24: that is carried by the inner arm of the lever 21.

The blade 2 terminates at its upper end adjacent to the combined clamp and handle while the other blade 3 is extended outwardly beyondthe same and is provided in its outer portion with a longitudinal slot 25 in which operates a pivot 26, of the outer arm of the lever 21. The pivots 2-1 and 26 which are provided at their inner ends with heads carrying spacing sleeves 27 and 28 which are interposed between the connecting lever and the blades 2 and 3 and the front or outer ends of the said pivots 24 and 26' are threaded for the reception ofnuts 29jand 30, washers 31 and being interposed between the nuts and the outer face of the lever 21. It will be seen that when one of the blades is adjusted the other blade will be co1'respondingly moved through the Zmotion transmitted to it by the connecting lever. The pivot 22 which fulcrums the connecting lever on the front section?) of the combined clamp and handle is threaded into the said section 5 and 1t isprovided with a reduced smooth porneaacve tion adjacent to its head to form a journal or pivot for the lever. The smooth portion is formed by reducing the head of the pivot screw and is of greater diameter than the threaded portion of the same.

The handle and clamp l is provided with.

an opening 33 to enable it to be readily gripped and in the operation of the device the combined clamp and handle is placed against the outer edge of the arm of the square as illustrated in Fig. 1 of the drawings. Thebody portion and the arm of the squareiare graduated in inches and frac} tions of an inch and the blades 2 and 3am graduated into inches and twelfths of an inch, the measuring instrument being designed to be used in connection with a chart, not shown, and the scale being preferably one inch to a foot. The adjustment of the combined clamp and handle on thearm- 8 of the square will indicate the height of the ridge of the roof and the position of the blades 2 and 3 will give theangle of the inclination or bevel of the common rafters and the hip rafters with relation to the longer arm of the square. In practice, the chart will contain all the necessary data for cutting the various lengths and bevels of the rafters and 111 practice the slze of the parts and the length of the arms of the connecting lever will be properly proportioned to secure an accurate'adjustment ofthe blades 2 and 3 with respect to the square and to each other. The-lever is fulorumed at an intermediate point to form inner and outer arms, and theblades are also pivoted intermediate of their ends. the slots being located at opposite sides of the pivotal points and engaged by the inner and outer arms of the lever so that the blades are caused to move in unison and when one blade is adjusted the other will be auto' matically adjusted by the operation of the lover. The outer arm of the lever is connected with the outer arm of the blade 3, and the inner arm of the lever is connected with the inner arm of the blade 2, and when one of the blades is lifted the lever will effect a lifting movement of the other blade and a downward movement of either blade will cause the other blade to move in acorresponding direction, so that when one blade makes withtlie square the angle of the com mon rafter the other blade will make the corresponding angle of the hip raft-er. Also the position and relation of the slot of the blade will also be such as to secure the proper movement of the blades in the ad-' placed at 8 on the tongue and 12 on the body of the square. The stock is then moved along the tongue until the common rafter blade crosses the body of the square at 16 1;. The reading on the arm of the square will indicate the height of the ridge and the reading of the common and hip rafter blades at the body of the square will give the length of the common and hip rafters.

The combined handle and clamp has its sections formed with arcuate upper edges and the arcuate edge 3% of the front sec tion is beveled and graduated for indicating the angles or inclinations of the blade 2. The front and rear sections 5 and 6 are also provided at their inner faces with grooves 35 and 36 for the arcuate ribs of the blades. Various other means may of course be employed for pivotally mounting and clamping the blades in their adjustment but the present construction insures accuracy both in the clamping and the adjustment of the blades.

lVhat is claimed is 1. An instrument of the class described including a square, a stock adjustable along the arm of the square, a pair of blades extending across the angle of the square at an inclination in the same general direction and pivotally connected at their upper portions with the stock, and a lever pivotally connected with the blades and carried by the stock, said lever being arranged to actuate one of the blades automatically when the other blade is manually adjusted.

2. An instrument of the class described including a square, a stock adjustable on the square, blades mounted for pivotal movement on the stock, one of the blades being provided with a slot on one side of the pivot and the other blade having a slot on the opposite side of the said pivot, and a lever fulcrumed intermediate of its ends on the stock and provided with inner and outer arms operating in the said slots to effect a simultaneous movement of the blades.

3. An instrument of the class described including a square, a combined clamp and handle constitutin a stock and composed of inner, outer and intermediate sections, a

pair of blades extending in the same general direction across the angle of the square and mounted at their upper portions for pivotal movement between the said sections of the combined clamp and handle, means for adjusting the sections to engage and release the blades, and means for transmitting motion from one blade to the other, whereby when one of the blades is adjusted manually the other blade will be automatically adjusted.

4. An instrument of the class described including a combined clamp and handle composed of front. rear and intermediate sections, the intermediate section being provided with arcuate ribs and the front and rear sections having corresponding grooves, a pair of blades provided with arcuate grooves stamped in the blades and receiving the ribs of the intermediate section and forming concentric ribs to fit in the grooves of the other sections and means for causing the sections to clamp the blades in their adjustment.

5. An instrument of the class described including a combined clamp and handle composed of front, rear and intermediate sections, the intermediate section being provided with arcuate ribs and the front and rear sections having corresponding grooves, a pair of blades provided with arcuate grooves stamped in the blades and receiving the ribs of the intermediate section and forming ribs to fit in the grooves of the other sections, one of the said blades being provided with a slot at one side of the grooves and the other blade being provided with a slot at the opposite side of the grooves, and a connecting lever fulcrumed at an intermediate point on the combined handle and clamp and provided with inner and outer pivots operating in the said slot.

6. An instrument of the class described including a square, a combined handle and clamp having a graduated upper edge and a lower handle portion and movable along the arm of the square, a pair of blades eX- tending in the same general direction across the angle of the square at an inclination and mounted at their upper portions for pivotal movement on the combined handle and clamp, one of the blades being arranged to move over the raduated arcuate portion. means for t"ansmitting motion from one of the blades to the other blade to secure a simultaneous operation of the blades and means for clamping the blades in their adjustment.

In testimony whereof I ailix my signature in presence of two witnesses.

JOHN C. BROWN.

lVitnesses RAYMOND Enonn'rr, V. C. ALMAND.

Gopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

